<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>原生Ajax</title>
</head>
<body>
    
    <input type="button" value="获取数据" onclick="getData()">

    <div id="div1"></div>

</body>
<script>
    function getData(){
        //1. 创建XMLHttpRequest
                var xmlHttpRequest  = new XMLHttpRequest();

                //2. 发送异步请求
                xmlHttpRequest.open('GET','http://yapi.smart-xwork.cn/mock/169327/emp/list');
                xmlHttpRequest.send();//发送请求

                //3. 获取服务响应数据
                xmlHttpRequest.onreadystatechange = function(){
                    if(xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200){
                        document.getElementById('div1').innerHTML = xmlHttpRequest.responseText;
                    }
                }
    }
</script>
</html>